Injection mold convenient for heat dissipation

Abstract

The utility model discloses a kind of injection moulds facilitating heat dissipation applied to injection mould field, by being equipped with detachable additional cylinder on cooling water inlet pipe, and filling reagent in additional cylinder, simultaneously, using branch valve group and valve plate cooperation, cooling liquid into cooling water inlet pipe is guided into additional cylinder, and after passing through additional cylinder, reagent is carried backflow to cooling water inlet pipe, finally into the cooling passage of mould body, so that reagent and scale in cooling passage produce reaction, so that scale is decomposed, then with cooling water discharge mould body, in this way, without being through dismounting mould body, the scale in interior can be cleaned, so that mould body can continuous operation, improve overall production efficiency;In addition, branch valve group and valve plate cooperation can also make cooling liquid only circulate in cooling water inlet pipe, so that dismounting additional cylinder will not affect the circulation flow of cooling liquid, also will not affect the continuous operation of mould body.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to an injection mold that facilitates heat dissipation. Background Technology

[0002] An injection mold is a tool used for plastic injection molding. It usually consists of an upper mold and a lower mold. Its main function is to inject molten plastic into the mold cavity. After cooling and solidification, it forms a plastic product of the desired shape. Injection molds are usually made of mold steel or alloy, which has high strength and wear resistance and can withstand high pressure and high temperature working environments.

[0003] Existing technology (patent document CN221456631U) discloses a heat-dissipating plastic injection mold, including a base, a lower shell fixedly connected to the upper end of the base, an upper shell mounted on the upper end of the lower shell, and mold bodies provided on the inner sides of both the lower and upper shells; cavities are formed in the side walls of both the lower and upper shells, and a water tank communicating with the cavities is fixedly connected to the upper end of the base. This heat-dissipating plastic injection mold, when activated by a water pump, delivers water from its tank to the inner side of the lower shell cavity via a delivery pipe. With the cooperation of a connector and a corrugated pipe, the water inside the lower shell enters the inner side of the upper shell, and then flows back to the inner side of the water tank through a drain pipe. Cooling is achieved through a semiconductor cooling plate inside the water tank, and through the cooperation of a heat-absorbing plate and a heat-conducting rod, the heat of the workpiece inside the mold body is transferred to the inner side of the cavity. The flow of water rapidly dissipates heat from the workpiece, thereby improving the processing efficiency.

[0004] Based on the above research and existing technology, it was found that most existing injection molds achieve rapid cooling by opening cooling channels inside the mold and injecting circulating cooling water. However, after prolonged use, scale easily forms in the cooling channels. Scale reduces the heat exchange efficiency between the cooling water and the mold (including the molded product inside), resulting in a decrease in cooling effect. In severe cases, the accumulated scale can cause blockages, affecting the normal operation of the mold. In existing technologies, it is generally necessary to remove the mold and clean it with special equipment (such as a mold water channel cleaning machine), which is inefficient and prevents the mold from operating continuously, thus reducing overall production efficiency. Utility Model Content

[0005] The core of this invention lies in adding a detachable auxiliary cylinder to the cooling water inlet pipe and filling the auxiliary cylinder with reagents. Simultaneously, by utilizing a branch valve assembly in conjunction with a valve plate, it solves the problem in existing technologies that typically require mold removal and cleaning with specialized equipment, thus reducing overall production efficiency. Furthermore, disassembling the auxiliary cylinder does not affect the circulation of the coolant, nor does it disrupt the continuous operation of the mold body.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An injection mold that facilitates heat dissipation includes a mold base and a mold body mounted on the mold base. The mold body consists of an openable upper mold and a lower mold. An injection port is provided on the top of the upper mold of the mold body. A cooling channel is provided inside the mold body. A cooling water inlet pipe communicating with the cooling channel is fixed on one side of the lower mold of the mold body. The upper end of the cooling water inlet pipe is integrally formed with a connecting pipe, and an auxiliary cylinder is detachably connected inside the connecting pipe. The auxiliary cylinder contains a reagent for removing scale. A first valve seat is fixed inside the cooling water inlet pipe. A valve plate is rotatably connected inside the first valve seat. A branch valve assembly is installed at the end of the connecting pipe that communicates with the cooling water inlet pipe. The branch valve assembly cooperates with the valve plate to guide the coolant entering the cooling water inlet pipe into the auxiliary cylinder. After passing through the auxiliary cylinder, the coolant carries the reagent back to the cooling water inlet pipe and finally enters the cooling channel of the mold body.

[0008] By installing a detachable auxiliary cylinder on the cooling water inlet pipe and filling the auxiliary cylinder with reagents, and using a branch valve assembly in conjunction with a valve plate, the coolant entering the cooling water inlet pipe is guided into the auxiliary cylinder. After passing through the auxiliary cylinder, the coolant carries the reagents back into the cooling water inlet pipe and finally enters the cooling channel of the mold body. This allows the reagents to react with the scale in the cooling channel, decomposing the scale, which is then discharged from the mold body with the cooling water. In this way, the scale inside the mold body can be cleaned without disassembling the mold body, allowing the mold body to operate continuously and improving overall production efficiency.

[0009] Furthermore, the branch valve assembly includes a fixed plate and a rotating plate. The fixed plate is fixed to the inner wall of the connecting pipe. Two flow holes are provided on the fixed plate, which are symmetrically arranged along the rotation axis of the valve plate. The two flow holes are located on both sides of the first valve seat. The rotating plate is coaxially connected to the valve plate. A valve shaft is rotatably connected to the lower end of the cooling water inlet pipe. The upper end of the valve shaft is fixedly connected to the bottom of the cooling water inlet pipe, the first valve seat, the valve plate, and the rotating plate. The upper end of the valve shaft is rotatably connected to the bottom of the fixed plate.

[0010] Furthermore, a partition seat is provided between the bottom of the rotating plate and the upper end of the first valve seat. The partition seat is fixed to the inner wall of the connecting pipe, the upper end of the partition seat is rotatably connected to the bottom of the rotating plate, and the lower end of the partition seat is fixed to the top of the first valve seat. The partition seat cooperates with the first valve seat to separate the connection port between the cooling water inlet pipe and the connecting pipe.

[0011] Furthermore, a second positioning block is fixed inside the cooling water inlet pipe, and the second positioning block abuts against the side wall of the valve plate after rotation. A first positioning block is fixed on the first valve seat, and the first positioning block abuts against the side wall of the valve plate that blocks the first valve seat. The first positioning block and the second positioning block are located on both sides of the rotation axis of the valve plate.

[0012] Furthermore, the inner wall of the upper opening of the connecting pipe is provided with an internal thread groove, and the outer wall of the auxiliary cylinder is integrally formed with an external thread part that matches the internal thread groove. A sealing gasket is also movably embedded in the connecting pipe. The sealing gasket is located between the end of the auxiliary cylinder opening and the fixed plate and is clamped by the auxiliary cylinder and the fixed plate.

[0013] Preferably, the valve shaft has two positioning holes extending radially along the valve shaft, the two positioning holes forming a 90° angle on the horizontal plane, and a positioning bolt is threaded through the lower end of the cooling water inlet pipe, and the end of the positioning bolt is integrally formed with a positioning pin that matches the positioning hole. The end of the valve shaft away from the fixed plate extends to the outside of the cooling water inlet pipe and is fixed with a handwheel.

[0014] Compared with existing technologies, the advantages of this utility model are: (1) This solution involves installing a detachable auxiliary cylinder on the cooling water inlet pipe and filling the auxiliary cylinder with reagents. At the same time, the coolant entering the cooling water inlet pipe is introduced into the auxiliary cylinder by using a branch valve assembly and valve plate. After passing through the auxiliary cylinder, the coolant carries the reagent back to the cooling water inlet pipe and finally enters the cooling channel of the mold body. This allows the reagent to react with the scale in the cooling channel, decompose the scale, and then discharge the mold body with the cooling water. In this way, the scale inside can be cleaned without disassembling the mold body, allowing the mold body to operate continuously and improving the overall production efficiency. In addition, the branch valve assembly, in conjunction with the valve plate, allows the coolant to flow only in the cooling water inlet pipe without passing through the auxiliary cylinder. This allows the operator to remove the auxiliary cylinder, add new reagents, and easily clean the scale that has formed again. Furthermore, removing the auxiliary cylinder will not affect the circulation of the coolant, nor will it affect the continuous operation of the mold body.

[0015] (2) By setting the second positioning block and the first positioning block, this solution can limit the rotation angle of the valve plate, so that the valve plate is fully open or fully closed when it rotates, and thus the rotation angle of the rotating plate is also constant, so that the flow hole is fully open or fully closed after rotation. This ensures that the angle of the valve plate and the rotating plate is constant when the operator rotates the valve plate and the rotating plate, achieving accurate opening and closing, and reducing the probability of coolant leakage when disassembling the auxiliary cylinder. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the cooling water inlet pipe and auxiliary cylinder of this utility model; Figure 3 This is a cross-sectional view of the cooling water inlet pipe and the auxiliary cylinder of this utility model; Figure 4 This is a schematic diagram of a half-section of the cooling water inlet pipe of this utility model; Figure 5 This is a schematic diagram of the valve plate, branch valve assembly and valve shaft structure of this utility model.

[0017] Explanation of the labels in the diagram: 1. Mold base; 2. Mold body; 21. Injection port; 3. Cooling water inlet pipe; 31. Connecting pipe; 311. Internal threaded groove; 32. First valve seat; 321. First positioning block; 33. Separator seat; 34. Second positioning block; 4. Additional cylinder; 41. External threaded part; 5. Valve plate; 6. Branch valve group; 61. Fixed plate; 611. Flow hole; 62. Rotating plate; 7. Positioning bolt; 8. Valve shaft; 81. Positioning hole; 82. Handwheel; 9. Sealing gasket. Detailed Implementation

[0018] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0019] First implementation method: Please see Figures 1-5 An injection mold for easy heat dissipation includes a mold base 1 and a mold body 2 mounted on the mold base 1. The mold body 2 is composed of an openable upper mold and a lower mold. An injection port 21 is provided on the top of the upper mold of the mold body 2. A cooling channel is provided inside the mold body 2. A cooling water inlet pipe 3 communicating with the cooling channel is fixed on one side of the lower mold of the mold body 2. The upper end of the cooling water inlet pipe 3 is integrally formed with a connecting pipe 31. An auxiliary cylinder 4 is detachably connected inside the connecting pipe 31. The auxiliary cylinder 4 contains a reagent for removing scale (a chemical reagent commonly used in the prior art and applicable to this embodiment, such as dilute hydrochloric acid, is used. The proportion added can be controlled by those skilled in the art according to the requirements. The controlled proportion can be the same as that in the prior art, and will not be described in detail here). A first valve seat 32 is fixed inside the cooling water inlet pipe 3. A valve plate 5 is rotatably connected inside the first valve seat 32. A branch valve group 6 is installed at the end of the connecting pipe 31 that communicates with the cooling water inlet pipe 3.

[0020] Based on the above structure, when it is necessary to clean the scale formed in the cooling channel of the mold body 2, simply connect the auxiliary cylinder 4 containing the reagent to the connecting pipe 31 and rotate the branch valve assembly 6 and the valve plate 5. The branch valve assembly 6 and the valve plate 5 will cooperate to guide the coolant in the cooling water inlet pipe 3 into the auxiliary cylinder 4. After passing through the auxiliary cylinder 4, the coolant will carry the reagent back to the cooling water inlet pipe 3 and finally enter the cooling channel of the mold body 2. This will cause the reagent to react with the scale in the cooling channel, decompose the scale, and then discharge it from the mold body 2 with the cooling water. In this way, the scale inside can be cleaned without disassembling the mold body 2, allowing the mold body 2 to operate continuously and improving the overall production efficiency. In addition, the branch valve assembly 6, in conjunction with the valve plate 5, allows the coolant to flow only in the cooling water inlet pipe 3 without passing through the auxiliary cylinder 4. This allows the operator to remove the auxiliary cylinder 4, add new reagents, and easily clean the scale that has formed again. Furthermore, removing the auxiliary cylinder 4 will not affect the circulation of the coolant, nor will it affect the continuous operation of the mold body 2.

[0021] It should be noted that, in order to inhibit the formation of scale, the reagent in the auxiliary cylinder 4 can also be replaced, for example, by replacing it with a filter element to intercept impurities in the cooling water and reduce the accumulation of scale. In addition, the type of reagent can also be changed, for example, by replacing it with a scale inhibitor or corrosion inhibitor specifically for cooling water, which can inhibit the deposition of minerals and the growth of microorganisms, thus also achieving the purpose of reducing scale formation. Furthermore, multiple sets of connecting pipes 31, auxiliary cylinders 4, branch valve groups 6, and valve plates 5 can be installed to simultaneously use filter elements, different reagents, etc., in order to better reduce the rate of scale accumulation and enhance the efficiency and effect of scale removal.

[0022] Furthermore, the branch valve assembly 6 includes a fixed plate 61 and a rotating plate 62. The fixed plate 61 is fixed to the inner wall of the connecting pipe 31. Two flow holes 611 are provided on the fixed plate 61, which are symmetrically arranged along the rotation axis of the valve plate 5. The two flow holes 611 are located on both sides of the first valve seat 32. The rotating plate 62 is coaxially connected to the valve plate 5. A valve shaft 8 is rotatably connected to the lower end of the cooling water inlet pipe 3. The upper end of the valve shaft 8 is fixedly connected through the bottom of the cooling water inlet pipe 3, the first valve seat 32, the valve plate 5 and the rotating plate 62. The upper end of the valve shaft 8 is rotatably connected to the bottom of the fixed plate 61.

[0023] The operator only needs to rotate the valve shaft 8 to drive the valve plate 5 and the rotating plate 62 to rotate synchronously. When the valve plate 5 closes the first valve seat 32, the cooling water inlet pipe 3 is cut off. The rotating plate 62 then leaves the area of ​​the flow hole 611, so that the cooling water inlet pipe 3 on one side of the valve plate 5 forms a new passage between the inner cavity of the auxiliary cylinder 4 and the other side of the valve plate 5 through the two flow holes 611. This allows the cooling water to flow through the auxiliary cylinder 4 and carry the reagent to clean the scale in the cooling channel inside the mold body 2. When the valve plate 5 is opened to connect the first valve seat 32, the rotating plate 62 closes the two flow holes 611, so that the cooling water only flows through the cooling water inlet pipe 3, which makes it easy for the staff to disassemble the auxiliary cylinder 4 and does not affect the normal flow of cooling water.

[0024] Furthermore, a partition seat 33 is provided between the bottom of the rotating plate 62 and the upper end of the first valve seat 32. The partition seat 33 is fixed to the inner wall of the connecting pipe 31. The upper end of the partition seat 33 is rotatably connected to the bottom of the rotating plate 62, and the lower end of the partition seat 33 is fixed to the top of the first valve seat 32. The partition seat 33 cooperates with the first valve seat 32 to separate the connection between the cooling water inlet pipe 3 and the connecting pipe 31. The partition seat 33 can compensate for the gap between the top of the first valve seat 32 and the bottom of the rotating plate 62, so that the cooling water cannot pass through the gap between the top of the first valve seat 32 and the bottom of the rotating plate 62 when it flows, forming a predetermined flow pattern and ensuring the effectiveness of the cooperation between the valve plate 5 and the branch valve group 6.

[0025] Furthermore, a second positioning block 34 is fixed inside the cooling water inlet pipe 3. The second positioning block 34 abuts against the side wall of the valve plate 5 after it has rotated 90°. A first positioning block 321 is fixed on the first valve seat 32. The first positioning block 321 abuts against the side wall of the valve plate 5 that blocks the first valve seat 32. The first positioning block 321 and the second positioning block 34 are located on both sides of the rotation axis of the valve plate 5.

[0026] By setting the second positioning block 34 and the first positioning block 321, the rotation angle of the valve plate 5 can be limited, so that the valve plate 5 is in a fully open or fully closed state when it rotates. This makes the rotation angle of the rotating plate 62 constant (90°), so that the flow hole 611 is fully open or fully closed after rotation. This ensures that the angle when the operator rotates the valve plate 5 and the rotating plate 62 is constant, achieving accurate opening and closing and reducing the probability of coolant leakage when disassembling the auxiliary cylinder 4.

[0027] Furthermore, the inner wall of the upper opening of the connecting pipe 31 is provided with an internal thread groove 311, and the outer wall of the auxiliary cylinder 4 is integrally formed with an external thread part 41 that matches the internal thread groove 311, which facilitates disassembly. A sealing gasket 9 is also movably embedded in the connecting pipe 31. The sealing gasket 9 is located between the opening end of the auxiliary cylinder 4 and the fixing plate 61 and is clamped by the auxiliary cylinder 4 and the fixing plate 61, so that the auxiliary cylinder 4 can be reliably sealed after installation, reducing the probability of coolant leakage. Of course, in other parts that need to be sealed, sealing elements (such as sealing rings, sealing strips, etc.) can also be used to achieve the corresponding sealing effect. For example, between the fixed plate 61 and the rotating plate 62, between the valve plate 5 and the first valve seat 32, between the rotating plate 62 and the partition seat 33, and between the valve shaft 8 and the cooling water inlet pipe 3. The setting method of the sealing element can adopt the setting method commonly used in the prior art, and will not be described in detail here.

[0028] Second implementation method: Please see Figure 4 - Figure 5 An injection mold that facilitates heat dissipation, differing from the first embodiment in that: Two positioning holes 81 extending radially along the valve shaft 8 are provided on the valve shaft 8. The two positioning holes 81 form a 90° angle on the horizontal plane. The lower end of the cooling water inlet pipe 3 is threaded through with a positioning bolt 7. The end of the positioning bolt 7 is integrally formed with a positioning pin that matches the positioning hole 81. The end of the valve shaft 8 away from the fixed plate 61 extends to the outside of the cooling water inlet pipe 3 and is fixed with a handwheel 82.

[0029] By setting the positioning bolt 7, the operator can tighten the positioning bolt 7 before and after the valve shaft 8 rotates, so that the positioning pin at the end of the positioning bolt 7 is inserted into the positioning hole 81 to fix the valve shaft 8. This makes the valve plate 5 and the rotating plate 62 stable in position before and after rotation, so that the valve plate 5 and the rotating plate 62 are not prone to accidental rotation, thus improving the stability and reliability of the heat dissipation injection mold.

[0030] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. An injection mold for easy heat dissipation, comprising a mold base (1) and a mold body (2) mounted on the mold base (1), wherein the mold body (2) is composed of an openable upper mold and a lower mold, an injection port (21) is provided on the top of the upper mold of the mold body (2), a cooling channel is provided inside the mold body (2), and a cooling water inlet pipe (3) communicating with the cooling channel is fixed on one side of the lower mold of the mold body (2), characterized in that: The upper end of the cooling water inlet pipe (3) is integrally formed with a connecting pipe (31), and an auxiliary cylinder (4) is detachably connected inside the connecting pipe (31). The auxiliary cylinder (4) contains a reagent for removing scale. A first valve seat (32) is fixed inside the cooling water inlet pipe (3). A valve plate (5) is rotatably connected inside the first valve seat (32). A branch valve assembly (6) is installed at the end of the connecting pipe (31) that is connected to the cooling water inlet pipe (3). The branch valve assembly (6) cooperates with the valve plate (5) to guide the coolant entering the cooling water inlet pipe (3) into the auxiliary cylinder (4). After passing through the auxiliary cylinder (4), the coolant carries the reagent back to the cooling water inlet pipe (3) and finally enters the cooling channel of the mold body (2).

2. The injection mold for easy heat dissipation according to claim 1, characterized in that: The branch valve assembly (6) includes a fixed plate (61) and a rotating plate (62). The fixed plate (61) is fixed to the inner wall of the connecting pipe (31). The fixed plate (61) has two flow holes (611) symmetrically arranged along the rotation axis of the valve plate (5). The two flow holes (611) are located on both sides of the first valve seat (32). The rotating plate (62) is coaxially connected to the valve plate (5). The lower end of the cooling water inlet pipe (3) is rotatably connected to a valve shaft (8). The upper end of the valve shaft (8) is fixedly connected through the bottom of the cooling water inlet pipe (3), the first valve seat (32), the valve plate (5) and the rotating plate (62). The upper end of the valve shaft (8) is rotatably connected to the bottom of the fixed plate (61).

3. The injection mold for easy heat dissipation according to claim 2, characterized in that: A partition seat (33) is provided between the bottom of the rotating plate (62) and the upper end of the first valve seat (32). The partition seat (33) is fixed to the inner wall of the connecting pipe (31). The upper end of the partition seat (33) is rotatably connected to the bottom of the rotating plate (62). The lower end of the partition seat (33) is fixed to the top of the first valve seat (32). The partition seat (33) cooperates with the first valve seat (32) to separate the communication port between the cooling water inlet pipe (3) and the connecting pipe (31).

4. The injection mold for easy heat dissipation according to claim 3, characterized in that: A second positioning block (34) is fixed inside the cooling water inlet pipe (3). The second positioning block (34) abuts against the side wall of the valve plate (5) after rotation. A first positioning block (321) is fixed on the first valve seat (32). The first positioning block (321) abuts against the side wall of the valve plate (5) that blocks the first valve seat (32). The first positioning block (321) and the second positioning block (34) are located on both sides of the rotation axis of the valve plate (5).

5. The injection mold for easy heat dissipation according to claim 1, characterized in that: The upper opening of the connecting pipe (31) has an internal thread groove (311) on its inner wall. The outer wall of the auxiliary cylinder (4) is integrally formed with an external thread part (41) that matches the internal thread groove (311). A sealing gasket (9) is also movably embedded in the connecting pipe (31). The sealing gasket (9) is located between the opening end of the auxiliary cylinder (4) and the fixing plate (61) and is clamped by the auxiliary cylinder (4) and the fixing plate (61).

6. The injection mold for easy heat dissipation according to claim 2, characterized in that: Two positioning holes (81) are provided on the valve shaft (8) and extend radially along the valve shaft (8). The two positioning holes (81) form a 90° angle on the horizontal plane. The lower end of the cooling water inlet pipe (3) is threaded with a positioning bolt (7). The end of the positioning bolt (7) is integrally formed with a positioning pin that matches the positioning hole (81). The valve shaft (8) extends away from the fixed plate (61) to the outside of the cooling water inlet pipe (3) and is fixed with a handwheel (82).

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